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A196315 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,3,0,2,4 for x=0,1,2,3,4 0
1, 7, 30, 495, 17093, 1313940, 228181579, 88027683663, 75477277195192, 143743832507166333 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Every 0 is next to 0 1's, every 1 is next to 1 3's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 4's
Diagonal of A196322
LINKS
EXAMPLE
Some solutions for n=4
..0..2..0..0....0..2..0..0....0..0..0..2....0..2..0..0....2..0..2..0
..2..2..0..0....2..2..0..0....0..0..0..0....2..2..0..0....0..2..3..2
..0..0..0..0....0..0..0..0....2..2..2..0....0..0..2..2....0..2..0..0
..0..0..0..0....0..2..2..0....0..0..2..0....2..0..2..0....0..2..0..2
CROSSREFS
Sequence in context: A271554 A296013 A196338 * A156347 A221402 A065916
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 01 2011
STATUS
approved

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Last modified May 26 07:52 EDT 2024. Contains 372807 sequences. (Running on oeis4.)